PyJNIus is a simple-to-use Java interface for Python. However, JPype is a better alternative.
Installation
pip install Cython
pip install pyjnius
Example with Imported Jar
import os
os.environ["CLASSPATH"] = "/path/to/your.jar"
from jnius import autoclass
YourClass = autoclass(path.to.YourClass)
yourObj = YourClass()
Note: Avoid using the same name for an instance varialbe and a method in the same class. Even though Java is able to distinguish between them PyJNIus is not able to. A method will be hide by the instance variable with the same name if you use the Jar via PyJNIus in Python. Generally speaking, it is a bad idea to have the same for an instance variable and a method as it might confuse other programming languages (e.g., Kotlin) and frameworks too.